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A state of the art on solar-powered vapor absorption cooling systems integrated with thermal energy storage

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Abstract

The intermittent nature of solar energy is a dominant factor in exploring well-designed thermal energy storages for consistent operation of solar thermal-powered vapor absorption systems. Thermal energy storage acts as a buffer and moderator between solar thermal collectors and generators of absorption chillers and significantly improves the system performance. Vapor absorption chillers are available in half, single, double, and triple-effect modes of operation and operate at temperatures ranging from 75 to 220 °C to produce a cooling effect with COPs ranging from 0.3 to 1.8. Thus, the selection of appropriate solar collectors and thermal energy storages are two significant decisions affecting the consistency of output of a vapor absorption refrigeration system. The present review of state of the art is focused on the appropriate selection, from among different types of solar collectors available to meet the demand of capacity and degree of thermal energy required in operating absorption chillers at optimum performance. Characteristics of various thermal energy storage systems and their integration with solar thermal collectors and absorption chillers are also investigated to meet the demand for heat during non-sunshine hours or periods of low solar intensity. In the latter section, economic feasibility is explored so that a sustainable solar cooling system can be proposed which can work consistently with the best performance throughout its entire life.

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Abbreviations

CFD:

Computational fluid dynamics

CNT:

Carbon nanotubes

COP:

Coefficient of performance

CPC:

Compound parabolic parameter

CPVT:

Concentrated photovoltaic thermal

DNI:

Direct normal irradiance

EFPC:

Evacuated flat plate collector

EG:

Expanded graphite

ESD:

Energy storage density

ETC:

Evacuated tube collector

FPC:

Flat plate collector

GHI:

Global horizontal irradiance

HDPE:

High-density polyethylene

HTF:

Heat transfer fluid

LFRC:

Linear Fresnel’s reflector collector

LHTES:

Latent heat thermal energy storage

MCT:

Micro-concentrating collector

NPV:

Net present value

PBP:

Payback period

PCM:

Phase change material

PMMA:

Polymethylmethacrylate

PTC:

Parabolic trough collector

PV:

Photovoltaic

PVT:

Photovoltaic thermal

SHTES:

Sensible heat thermal energy storage

SS:

Shape stabilized

STC:

Solar thermal collector

TCES:

Thermochemical energy storage

TES:

Thermal energy storage

T evap :

Evaporator temperature

T gen :

Generator temperature

VAM:

Vapor absorption machine

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Correspondence to Dinesh Kumar Sharma.

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Responsible editor: Philippe Garrigues

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Sharma, D.K., Sharma, D. & Ali, A.H.H. A state of the art on solar-powered vapor absorption cooling systems integrated with thermal energy storage. Environ Sci Pollut Res 27, 158–189 (2020). https://doi.org/10.1007/s11356-019-06941-x

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  • DOI: https://doi.org/10.1007/s11356-019-06941-x

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